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Finding the Fourth Proportional to 461.87, 693.08 and 218.42

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Solution

The fourth proportional to 461.87, 693.08 and 218.42 is: 327.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.87 : 693.08 = 218.42 : x
  2. Step 2: Convert to fraction form
    461.87/693.08 = 218.42/x
  3. Step 3: Cross multiply
    461.87x = 693.08 × 218.42
  4. Step 4: Simplify right side
    461.87x = 151,382.53
  5. Step 5: Solve for x
    x = 151,382.53/461.87
  6. Step 6: Final answer
    x = 327.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.